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*Denton, Debra
Message 1 of 2 (125 Views)

AcDbDictionary Corrupt drawings Win2000 server

125 Views, 1 Replies
04-05-2001 01:21 AM
> We are experiencing drawings becoming corrupt and unrecoverable and was

> wondering if any one else has come across this problem. I have searched

> Autodesk's web site for help on this and there is none.

>

> All our drawings are located on a network server and everyone works on the

> drawings directly from the server. We recently switched from a NT to a WIN

> 2000 server, and ever since then drawings randomly become corrupt and

> unrecoverable.

>

> Here's the first error when trying to load the drawing and by the way you

> can see the drawing perfectly fine in the preview window:

>

> FATAL ERROR: Unhandled Access Violation Reading 0x0004 Execption at

> 6544b3e9h

>

> Next I tried to recover the drawing and get the following:

>

> DXF Name Current Value Validation Default

>

> AcDbDictionary (1F7C5) Owner Id Is Null

>

> Total errors found 1 fixed 1

>

> Audit accepted recovered database.

>

> Then the next fatal error appears:

>

> FATAL ERROR: Unhandled Access Violation Reading 0x0004 Execption at
5927ceh

>

> I've tried inserting it as a WBLOCK into a blank drawing and nothing works

> the drawing is corrupted at this point. The common denominator for all the

> drawings that have become corrupt is this AcDbDictionary error.

>

> Thanks in advance

>

> Debbie
*Januszkiewicz, Alex
Message 2 of 2 (125 Views)

Re: AcDbDictionary Corrupt drawings Win2000 server

04-05-2001 11:29 PM in reply to: *Denton, Debra
I don't know why your drawings suddenly started to crash, but I wouldn't be
so eager to point the finger at Win2000. The AcDbDictionary ownership
problems are usually related to ARX program not managing properly its data
stored in a dictionary. Even worse, bad arx can mess up dictionary data that
belongs to other "well behaving" arx. Are you sure that the operating system
change was the only one that took place? No new or "updated" add-on software
for AutoCAD? I'm not saying it's not network, but I would analyse first any
changes/additions to AutoCAD software.

A bit off the topic, I'd like to straighten here one common misconception of
the preview image:
"perfectly fine preview" means absolutely nothing. The preview is a small
bitmap image of the screen generated by AutoCAD when saving the drawing.
That's all it is. It's not the real time view of the content of the file.
It's a "historical" picture of what was on screen when the drawing was
saved.

It is possible to have totally corrupted dwg, truncated by hard disk crash
to the point where there is no single entity left in it, still showing
perfect preview, as the bitmap and the header pointing to it was left
intact.

BTW: almost all drawings can be recovered, as most of them have 99.9% data
intact and only tiny fragment that messes up whole AutoCAD (which sometimes
may take 2-3 hours to find and repair for dwg data expert).

--
Alex Januszkiewicz
IntelCAD Systems / DWG Data Recovery Services
Autodesk Authorized Developer
http://www.intelcad.com
* BLITZ! - Standalone Tools For Processing DWG/DXF *
* DWF => DWG converter for AutoCAD 2000(i)*
--

"Debra Denton" wrote in message
news:C2A5BB333ACAB6BB4C243C8F6DD24574@in.WebX.maYIadrTaRb...
> > We are experiencing drawings becoming corrupt and unrecoverable and was
>
> > wondering if any one else has come across this problem. I have searched
>
> > Autodesk's web site for help on this and there is none.
>
> >
>
> > All our drawings are located on a network server and everyone works on
the
>
> > drawings directly from the server. We recently switched from a NT to a
WIN
>
> > 2000 server, and ever since then drawings randomly become corrupt and
>
> > unrecoverable.
>
> >
>
> > Here's the first error when trying to load the drawing and by the way
you
>
> > can see the drawing perfectly fine in the preview window:
>
> >
>
> > FATAL ERROR: Unhandled Access Violation Reading 0x0004 Execption at
>
> > 6544b3e9h
>
> >
>
> > Next I tried to recover the drawing and get the following:
>
> >
>
> > DXF Name Current Value Validation Default
>
> >
>
> > AcDbDictionary (1F7C5) Owner Id Is Null
>
> >
>
> > Total errors found 1 fixed 1
>
> >
>
> > Audit accepted recovered database.
>
> >
>
> > Then the next fatal error appears:
>
> >
>
> > FATAL ERROR: Unhandled Access Violation Reading 0x0004 Execption at
> 5927ceh
>
> >
>
> > I've tried inserting it as a WBLOCK into a blank drawing and nothing
works
>
> > the drawing is corrupted at this point. The common denominator for all
the
>
> > drawings that have become corrupt is this AcDbDictionary error.
>
> >
>
> > Thanks in advance
>
> >
>
> > Debbie
>

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